Indicates the type of units (linear, angular, or area) used by the coordinates of Geometry or CoordinateSystem, or used in a measurement or conversion function.

Namespace: ESRI.ArcGISExplorer.Geometry
Assembly: ESRI.ArcGISExplorer (in ESRI.ArcGISExplorer.dll) Version: 2.0.0.900 (2.0.0.900)

Syntax

C#
public enum UnitType

Visual Basic (Declaration)
Public Enumeration UnitType

Members

Value	Member name	Description
1	Angular	Specifies angular units of measurement, for example those used in polar coordinates such as Degrees or Radians. Angular units are used by geographic coordinate systems.
0	Linear	Specifies linear units of measurement, for example those measuring distance such as Meters or Miles. Linear units are used by projected coordinate systems, and in measurement and conversion functions.
2	Area	Specifies areal units of measurement, for example those measuring areas such as Hectares and Square Meters. Area units are used in measurement and conversion functions.

Remarks

The coordinates of a Geometry are defined by its coordinate system. Geographic coordinate systems use angular units, defining coordinates in terms of latitude and longitude, which are angles calculated from the center of the earth describing a position on its surface. Coordinates described in this way are sometimes referred to as polar coordinates. Projected coordinate systems use linear units, defining positions on the earths surface as coordinates on earths surface as projected to a flat plane. For this reason, the coordinates of a Geometry may be specified in linear or angular units, depending on the coordinate system used by the Geometry.

Examples

The code below uses the UnitType property to determine if the CoordinateSystem of an existing Point uses linear or angular Units, and then reports the X an Y coordinates; the code uses the LatitudeToString and LongitudeToString static methods on Unit to format the angular units strings.

CopyC#

// NOTE: existingPoint should be an existing Point with a CoordinateSystem set.
UnitType pointUnitType = existingPoint.CoordinateSystem.Unit.UnitType;

System.Text.StringBuilder sb = new System.Text.StringBuilder("Coordinates of the point are:");
sb.AppendLine();

// If the Point has angular units
if (pointUnitType == UnitType.Angular)
{
  sb.AppendLine("Latitude = " + existingPoint.Y.ToString());
  sb.AppendLine("Longitude = "+ existingPoint.X.ToString());
}
else if (pointUnitType == UnitType.Linear)
{
  sb.AppendLine("X = " + existingPoint.X.ToString());
  sb.AppendLine("Y = " + existingPoint.Y.ToString());
}

CopyVB.NET

' NOTE: existingPoint should be an existing Point with a CoordinateSystem set.
Dim pointUnitType As UnitType = existingPoint.CoordinateSystem.Unit.UnitType

Dim sb As New System.Text.StringBuilder("Coordinates of the point are:")
sb.AppendLine()

' If the Point has angular units
If pointUnitType = UnitType.Angular Then
  sb.AppendLine("Latitude = " & existingPoint.Y)
  sb.AppendLine("Longitude = " & existingPoint.X)
ElseIf pointUnitType = UnitType.Linear Then
  sb.AppendLine("X = " & existingPoint.X.ToString())
  sb.AppendLine("Y = " & existingPoint.Y.ToString())
End If

Relate Topics:
  CoordinateSystem Class
  CoordinateSystem.GeographicCoordinateSystems Class
  CoordinateSystem.ProjectedCoordinateSystems Class
  CoordinateSystemType Enumeration
  Envelope Class
  GeodesicUtilities Class
  GeographicTransformation Class
  GeographicTransformationCollection Class
  Geometry Class
  GeometryOperations Class
  GeometryType Enumeration
  Multipatch Class
  Multipoint Class
  Point Class
  Polygon Class
  Polyline Class
  SoapConverter Class
  Unit Class
  Unit.Angular Class
  Unit.Area Class
  Unit.Linear Class
  UnitNameOptions Enumeration

Syntax

Members

Remarks

Examples

See Also